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This antenna is interesting however, from what I can gather it shares very little with the Sigma design other then general appearance. This cone antenna is a 1/4 wave monopole that should have very wide bandwidth and that would be its advantage. It is not a sleeve monopole, skeleton sleeve monopole or coaxial J-Pole. The cone is connected to and part of the short vertical radiator. Because of this I would not expect it to develop any gain over a dipole.

[QUOTE="Shockwave, post: 283248, member: 10882"] This antenna is interesting however, from what I can gather it shares very little with the Sigma design other then general appearance. This cone antenna is a 1/4 wave monopole that should have very wide bandwidth and that would be its advantage. It is not a sleeve monopole, skeleton sleeve monopole or coaxial J-Pole. The cone is connected to and part of the short vertical radiator. Because of this I would not expect it to develop any gain over a dipole. [/QUOTE]

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